[wronskian]

I've seen the film already - there have been a few screenings of it here in Cambridge, UK at the university maths department. (Indeed, I wasn't aware it hadn't been generally released!) It's an interesting idea and quite reasonably played out without too much cliche and, impressively, not too many blunders in maths or tech. The way the premise has been turned into plot is not, however, so sound. Still, I found it sufficiently engaging and I'd recommend a viewing for anyone with an academic maths or science background.